Texas Instruments TPS610995YFFT

Overview

TPS610995YFFT from Texas Instruments is a synchronous boost converter optimized for ultra-low-power battery-powered systems, delivering fixed 3.6V output with 3.53–3.67V accuracy at PWM mode, 0.7–1.25A switch current limit, and 400nA quiescent current into VIN. It operates from 0.7V to 5.5V input and supports down mode regulation and true shutdown disconnection-enabling long runtime in optical heart rate monitors and memory LCD bias circuits.

For engineers reviewing the TPS610995YFFT datasheet, TPS610995YFFT pinout, TPS610995YFFT application, or TPS610995YFFT equivalent, key selection considerations include its 6-ball WCSP package (1.23mm × 0.88mm), hysteretic control topology, 75% efficiency at 10µA load, and fixed-output voltage behavior under light-load burst mode operation.

Technical Context

The TPS610995YFFT implements a hysteretic current-mode control architecture that dynamically adjusts switching frequency based on input/output voltage and inductor value-eliminating need for external compensation while maintaining high efficiency across 0.7V–5.5V input range. Its dual-mode operation includes regulated down mode (VIN > VOUT) and pass-through mode (VIN ≥ VOUT + 0.5V), with automatic transition between modes governed by internal voltage thresholds.

It integrates cycle-by-cycle overcurrent protection (OCP), thermal shutdown at 150°C with 25°C hysteresis, and output overvoltage protection (OVP) at 5.6–6.0V. The device uses an internal feedback divider for fixed 3.6V output, eliminating external resistors, and features true shutdown with ≤0.5µA VIN leakage and complete input-to-output isolation.

Key Specifications

Pinout & Package

TPS610995YFFT is housed in a 6-ball, 1.23mm × 0.88mm DSBGA (WCSP) package with bottom-side solder balls. Thermal performance is enhanced via direct die attachment to PCB through the exposed substrate; no thermal pad required beyond standard ball layout.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar boost converter applications.

Compared with TPS610994YFFT and TPS610996YFFT, the TPS610995YFFT provides optimal voltage alignment for 3.6V lithium-based battery mid-point regulation and memory LCD biasing-offering best-in-class efficiency at light loads without sacrificing thermal or package compatibility.

Availability

TPS610995YFFT is available at Aetrix Electronics and suitable for wearable fitness trackers, optical heart rate monitors, memory LCD bias circuits, and low-power wireless sensor nodes requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TPS610995YFFT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and power management technologies, with decades of leadership in high-efficiency DC/DC conversion.

The TPS61099x family was designed specifically for ultra-low-power, battery-constrained applications-including wearables and medical sensors-where sub-µA quiescent current and wide-input operation are mandatory for multi-year runtime.

FAQ

What is the output voltage tolerance of the TPS610995YFFT under PWM mode?

The TPS610995YFFT delivers a fixed 3.6V output with ±0.07V (3.53V to 3.67V) accuracy under PWM mode operating conditions, as specified in the Electrical Characteristics table. This tight tolerance ensures reliable biasing for precision analog circuits and memory LCDs without requiring external trimming or calibration. The TPS610995YFFT achieves this using factory-programmed internal feedback, eliminating resistor matching errors and drift over temperature.

Does the TPS610995YFFT require external feedback resistors?

No, the TPS610995YFFT does not require external feedback resistors because it is a fixed-output variant with internal EEPROM-programmed feedback. The FB pin is internally tied to GND, and the 3.6V regulation is achieved entirely within the IC. This simplifies PCB layout, reduces BOM count, and improves long-term stability compared to adjustable versions like the TPS61099, where resistor tolerance and temperature drift affect output accuracy.

How does the TPS610995YFFT behave when input voltage exceeds 3.6V?

When VIN rises above 3.6V, the TPS610995YFFT automatically enters down mode to maintain regulated 3.6V output until VIN reaches VOUT + 0.5V (4.1V). Beyond that, it transitions to pass-through mode where VOUT ≈ VIN – (IL × RDS(on)_HS + IL × DCR_L). This dual-mode behavior extends usable battery life by avoiding unnecessary switching losses while preserving output regulation across the full 0.7V–5.5V input range.

What is the minimum input voltage required for the TPS610995YFFT to start up successfully?

The TPS610995YFFT can start up from as low as 0.7V input voltage when loaded with ≥3kΩ (i.e., ≤1.2mA). Startup fails if the load draws excessive current before VOUT reaches ~1.6V, as the soft-start sequence limits initial peak current to ~200mA. For reliable cold-start under heavier loads, ensure input capacitance ≥10µF and consider pre-charging or reducing initial load current to allow VOUT ramp-up.

Is the TPS610995YFFT compatible with WEBENCH® Power Designer?

Yes, the TPS610995YFFT is fully supported in TI's WEBENCH® Power Designer tool. Engineers can enter 0.7–5.5V input, 3.6V output, and desired load current to generate optimized schematics, select recommended inductors/capacitors, simulate efficiency and thermal performance, and export CAD-ready layouts. The tool accounts for the device's hysteretic control, burst mode behavior, and fixed-output configuration to deliver accurate real-world design guidance for the TPS610995YFFT.